1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2019 Cyril Hrubis <chrubis@suse.cz>
* Copyright (c) Linux Test Project, 2019-2023
*/
/*\
* [Description]
* Very simple uevent netlink socket test.
*
* We fork a child that listens for a kernel events while parents creates and
* removes a virtual mouse which produces add and remove event for the device
* itself and for two event handlers called eventX and mouseY.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <sys/sysmacros.h>
#include <linux/uinput.h>
#include "tst_test.h"
#include "tst_uinput.h"
#include "uevent.h"
static int mouse_fd;
static void create_uinput_mouse(void)
{
mouse_fd = open_uinput();
setup_mouse_events(mouse_fd);
create_input_device(mouse_fd);
}
static void destroy_uinput_mouse(void)
{
destroy_input_device(mouse_fd);
}
static void get_minor_major(char *device, char *minor, char *major, size_t buf_sizes)
{
char path[1024];
struct stat stbuf;
snprintf(path, sizeof(path), "/dev/input/%s", device);
SAFE_STAT(path, &stbuf);
snprintf(major, buf_sizes, "MAJOR=%i", major(stbuf.st_rdev));
snprintf(minor, buf_sizes, "MINOR=%i", minor(stbuf.st_rdev));
}
#define MINOR_MAJOR_SIZE 32
static void verify_uevent(void)
{
int pid, fd;
char add_msg[1024];
char rem_msg[1024];
char dev_path[1024];
char add_msg_event1[1024];
char rem_msg_event1[1024];
char dev_path_event1[1024];
char add_msg_event2[1024];
char rem_msg_event2[1024];
char dev_path_event2[1024];
char dev_name1[1024];
char dev_name2[1024];
char minor_event1[MINOR_MAJOR_SIZE];
char minor_event2[MINOR_MAJOR_SIZE];
char major_event1[MINOR_MAJOR_SIZE];
char major_event2[MINOR_MAJOR_SIZE];
char *handlers, *handler1, *handler2, *sysname;
struct uevent_desc add = {
.msg = add_msg,
.value_cnt = 7,
.values = (const char*[]) {
"ACTION=add",
dev_path,
"SUBSYSTEM=input",
"NAME=\"virtual-device-ltp\"",
"PROP=0",
"EV=7",
"REL=3",
}
};
struct uevent_desc add_event1 = {
.msg = add_msg_event1,
.value_cnt = 6,
.values = (const char*[]) {
"ACTION=add",
"SUBSYSTEM=input",
dev_name1,
dev_path_event1,
minor_event1,
major_event1,
}
};
struct uevent_desc add_event2 = {
.msg = add_msg_event2,
.value_cnt = 6,
.values = (const char*[]) {
"ACTION=add",
"SUBSYSTEM=input",
dev_name2,
dev_path_event2,
minor_event2,
major_event2,
}
};
struct uevent_desc rem_event1 = {
.msg = rem_msg_event1,
.value_cnt = 6,
.values = (const char*[]) {
"ACTION=remove",
"SUBSYSTEM=input",
dev_name1,
dev_path_event1,
minor_event1,
major_event1,
}
};
struct uevent_desc rem_event2 = {
.msg = rem_msg_event2,
.value_cnt = 6,
.values = (const char*[]) {
"ACTION=remove",
"SUBSYSTEM=input",
dev_name2,
dev_path_event2,
minor_event2,
major_event2,
}
};
struct uevent_desc rem = {
.msg = rem_msg,
.value_cnt = 7,
.values = (const char*[]) {
"ACTION=remove",
dev_path,
"SUBSYSTEM=input",
"NAME=\"virtual-device-ltp\"",
"PROP=0",
"EV=7",
"REL=3",
}
};
const struct uevent_desc *const uevents[] = {
&add,
&add_event1,
&add_event2,
&rem_event1,
&rem_event2,
&rem,
NULL
};
fd = open_uevent_netlink();
create_uinput_mouse();
sysname = get_input_field_value('S');
handlers = get_input_field_value('H');
if (!sysname)
tst_brk(TBROK, "Expected /devices/virtual/input/inputN sysname!");
tst_res(TINFO, "Sysname: %s", sysname);
tst_res(TINFO, "Handlers: %s", handlers);
handler1 = strtok(handlers, " ");
if (!handler1)
tst_brk(TBROK, "Expected mouseX and eventY handlers!");
get_minor_major(handler1, minor_event1, major_event1, MINOR_MAJOR_SIZE);
handler2 = strtok(NULL, " ");
if (!handler2)
tst_brk(TBROK, "Expected mouseX and eventY handlers!");
get_minor_major(handler2, minor_event2, major_event2, MINOR_MAJOR_SIZE);
destroy_uinput_mouse();
snprintf(add_msg, sizeof(add_msg), "add@%s", sysname);
snprintf(rem_msg, sizeof(rem_msg), "remove@%s", sysname);
snprintf(dev_path, sizeof(dev_path), "DEVPATH=%s", sysname);
snprintf(add_msg_event1, sizeof(add_msg_event1),
"add@%s/%s", sysname, handler1);
snprintf(rem_msg_event1, sizeof(rem_msg_event1),
"remove@%s/%s", sysname, handler1);
snprintf(dev_path_event1, sizeof(dev_path_event1),
"DEVPATH=%s/%s", sysname, handler1);
snprintf(dev_name1, sizeof(dev_name1),
"DEVNAME=input/%s", handler1);
snprintf(add_msg_event2, sizeof(add_msg_event2),
"add@%s/%s", sysname, handler2);
snprintf(rem_msg_event2, sizeof(rem_msg_event2),
"remove@%s/%s", sysname, handler2);
snprintf(dev_path_event2, sizeof(dev_path_event2),
"DEVPATH=%s/%s", sysname, handler2);
snprintf(dev_name2, sizeof(dev_name2),
"DEVNAME=input/%s", handler2);
free(sysname);
free(handlers);
pid = SAFE_FORK();
if (!pid) {
wait_for_uevents(fd, uevents);
exit(0);
}
SAFE_CLOSE(fd);
wait_for_pid(pid);
}
static struct tst_test test = {
.test_all = verify_uevent,
.forks_child = 1,
.needs_checkpoints = 1,
.needs_drivers = (const char *const[]) {
"uinput",
NULL
},
.needs_root = 1,
};
|
